摘要
三羟甲基氨基甲烷与苦味酸(Pic)铜在乙醇水混合液中反应,制得少见的不对称氢键连接的超分子化合物{Cu[H_(2)NC(CH_(2)OH)_(3)]_(2)}{Pic}2·H_(2)O。晶体属三斜晶系,空间群为P,晶胞参数为a=6.894(1),b=8.219(1),c=13.543(3)??=79.290(1),?=83.36(2),?=84.590(1)化学式为C_(20)H_(30)CuN_(8)O_(22),V=746.9(2)3,Z=1,Dc=1.774 g/cm^(3),F(000)=411,?=0.844 mm^(-1),R=0.0334,Rw=0.0863。在配合物的结构单元中,Cu^(2+)位于对称中心,分别与2个四齿配体(三羟甲基氨基甲烷)中的2个OH,1个NH_(2),三齿配位,呈笼状螯合。而另一个OH,因配体和中心离子构型的限制,不参与配位。
The supramolecular complex{Cu[H_(2)NC(CH_(2)OH)_(3)]_(2)}{Pic}_(2)2H_(2)O was prepared by the reaction of niacinamice and copper picrate in ethanol water solution,and characterized by elemental analysis and IR spectroscopy.The crystal structure was determined by single-crystal diffraction analysis:triclinic,space group P with a=6.894(1),b=8.219(1),c=13.543(3)??=79.290(1),?=83.36(2),?=84.590(1)?V=746.9(2)3,Z=1,Dc=1.774 g/cm^(3),F(000)=411,?=0.844 mm^(-1),R=0.0334 and wR=0.0863.The crystal structure reveals that the copper ion is trans-octahedral with one-NH_(2) and two-OH of two tetradentate ligand niacinamice.Every{Cu[H_(2)NC(CH_(2)OH)_(3)]_(2)}{Pic}2·H_(2)O unit forms nine hydrogen bonds(of two types:OH…O and NH…O),bridging with other units.The complex forms a two-dimensional network through hydrogen bonds.
作者
曾明华
梁宏
石少明
郁开北
ZENG Ming-Hua;LIANG Hang;SHI Shao-Ming;YU Kai-Bei(Research Institute of Bioinorganic Chemistry,Department of Chemistry and Chemical Engineering,Guangxi Normal University,Guilin 541004,China;Analysis Center,Chengdu Branch of the Chinese Academy of Sciences,Chengdu 610041,China)
基金
广西高校科学基金资助课题
关键词
铜配合物
晶体结构
氢键
copper complex
crystal structure
hydrogen bond
two-dimensional network
